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ZOBEL, Johann Georg. MULLER, Joseph. Beschreibung einer Flachen-Berechnungs und Theilungs-Maschine.

Munich. Lindauer, 1815. First edition.
Quarto. x, 42pp. With three large folding plates. Contemporary red paper-covered boards, gilt, housed in recent custom buckram clamshell case. Lightly rubbed. Book-label of Erwin Tomash to FEP.
The first edition of a description of an integrating machine, employed in the surveying of irregular plots of land, which worked by dividing areas into manageable slices which were more easily calculable. The construction of the machine was necessitated by an attempt to reform the tax system of Bavaria; the authors of the present work appear to have been in the employ of the Bavarian tax authorities, Zobel as trigonometer to the king, while Muller, a mechanical craftsman, was responsible for construction of the instrument here described.

OCLC records copies at two locations (Delft and Michigan); COPAC adds one further (IET).

From the recently dispersed library of Erwin Tomash (1921-2012), American engineer recognised for his early pioneering work with computer equipment peripherals. His library consisted of over 3,000 books and manuscripts relevant to the history of computation, from medieval and renaissance works on arithmetic, finger-reckoning and the abacus, to the birth in the twentieth century of theoretical and practical computer science under Alan Turing.
Tomash Z 9.
£ 450.00 Antiquates Ref: 22512